Question

我正在尝试获取网页帖子附件。这是我试图获得的JSON：

{
  "attachments": {
    "data": [
      {
        "media": {
          "image": {
            "height": 720,
            "src": "url",
            "width": 720
          }
        }
      }
    ]
  },
  "id": "post_id"
}

我的@GET请求：

@GET("{post_id}")
fun getPostsAttachments(@Path("post_id") postId : String?,
                        @Query("access_token") authToken: String?,
                        @Query("fields") media : String?)
        :Observable<AttachmentsList>

可观察：

var getPostsAttachments: Observable<AttachmentsList> = facebook.getPostsAttachments(postId, "app_token", "attachments")
        getPostsAttachments.observeOn(AndroidSchedulers.mainThread())
                .subscribeOn(Schedulers.io())
                .subscribeBy(
                        onNext = { result ->
                        imgUrl?.addAll(result.data)
                        Log.d("TAG_NEXT", "$result")
                    },
                    onError = { throwable -> Log.d("TAG_ERROR", throwable.toString()) },
                    onComplete = { Log.d("TAG_COMPLETE", "$imgUrl") }
                )

它返回D/TAG_NEXT: AttachmentsList(data=null)和D/TAG_COMPLETE: null。

我该如何解决？也许我的链接请求有误？

Answer 1

从我在https://developers.facebook.com/docs/graph-api/reference/v2.11/attachment上看到的，你的通话路径是错误的。尝试将Retrofit调用注释更改为@GET("{post_id}/attachments")。

获取facebook帖子附件返回NullPointerException

1 个答案: